Tellurian



2 Sheets Sheet 1.

( Model.)

J.. & G. MCDONALD.

TELLURIANL" Patented Apr. 6, 1897.

lll'll IIN INVENTORS WITNESSES bmwwaed/ THE urmms PETERS co mum-mun wnmuamu. a. c.

(No Model.) 2 SheetsSheet 2.

J. & G. MODONALD TELLURIAN.

No. 580,328. Patented Arpn 6, 1897.

WITNESSES INVENTOR s jWJV/W 4 XMM .dttornay Tn: NnRms PETERS co. woro-umq WASHINGTON, u. c

NITED STATES PATENT FFICE.

JACOB MCDONALD AND GEORGE MCDONALD, OF IVAYNE, INDIANA.

TELLURIAN.

SPECIFICATION forming part of Letters Patent No. 580,328, dated April 6, 1897. Application filed May 11,1896. Serial No. 591,182. (No model.)

To all whom it may concern.-

Be it known that we, JACOB MCDONALD and GEORGE MCDONALD, citizens of the United States, and residents of Wayne township, in the county of Hamilton and State of Indiana, have invented certain new and useful Improvements in Tellurians; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a side elevation of the invention, partly in section, with the earth shown as at one limit of its movement and as at the opposite limit in dotted lines. Fig. 2 is a plan view of globe representing the earth and parts adjacent thereto. Fig. 3 is a plan view of invention, top of box being removed, with the earth shown as intermediate of the two positions shown in Fig. 1, the opposite position beingindicated by dotted lines. Fig. 4 is a side elevation of ball representing the earth and parts adjacent thereto in the positions they occupy in Fig. 3. Fig. 5 is a plan view of box with cover removed. Fig. 6 is a detail sectional view of means for revolving moon about the earth. Fig. 7 is a perspective view of sleeve L.

The object of this invention is to provide a tellurian of improved character wherein the various movements of the earth and moon with respect to the sun and to each other may be clearly illustrated, the mechanism employed being of simple character and not likely to become deranged.

WVith this object in view the invention consists in the novel construction and combination of parts, all as hereinafter described, and pointed out in the appended claims.

Referring to the accompanying drawings, the letter A designates a plate which is designed to be firmly secured to a Wall or other stationary object.

B is a bracket-arm which is hinged or pivoted to the said plate to swing in a horizontal plane to any desired position.

0 designates a box or casing which is pivotally secured to the outer end portion of the arm B.

D is a slide which is fitted to reciprocate horizontally in the said box or casing upon ways or guides D.

E is the main post, which is fixed at its lower end portion in the said slide, and whose upper portion carries two cranks E E at right angles one to the other.

F is a gear-wheel carrying ahub F, revolubly mounted on the said post.

F 2 is a second geanwheel in mesh with the first and having its axis fitted to receive a crank F G is a horizontal arm which is fixed to the hub F.

H is an oblique shaft representing the earths axis, said shaft being connected to the outer end portion of the arm G by means of a universal joint H. II is the representation of the earth, which is carried by the said shaft.

I is a representation of the moon, carried .b an arm I which-is secured to a sleeve 1 revolubly mounted on the shaft H.

J is a stationary disk which is secured to the lower crank E of the post E and is formed with a peripheral groove.

J is a pulley on the shaft II, whichis belted to the said stationary disk.

K is a crank whose lower portion is journaled in the arm G and its intermediate portion in a second horizontal arm K. The straight portion 0 of the main post E, between the two cranks E E also passes loosely through arm K.

L is a sleeve rotatably fitted 011 the outer end of arm K and formed with finger extensions Z, which engage the sleeve I M is a pitman-bar which connects the upper crank F. of the main post E with the crank K.

N is a link which is connected at one end portion to a wrist n of the gear-wheel F and at its opposite end portion to the box or casing. By means of this link the slide Dis caused to reciprocate as the gear-wheel F is rotated.

O is the representation of the sun, which is carried by a parallel arm I, pivotally connected to a second arm. P, which rises from the arm B.

The earth and sun are preferably not represented in their real relative proportions,

but more nearly in their apparent relative sizes.

The operation is as follows: The rotation of the gear-wheels F and F causes the arm G to revolve around the axis E, carrying with it the axis H and earth H The proper orbital movement of the latter and its relative distance from the sun at difierent points in the orbit corresponding to the different seasons is caused by the movement of the slide D. At the same time the diurnal rotation of the earth is illustrated by its revolution with the axis H, due to the pulley J, disk J, and connecting-belt. The inclination of the earths axis at all points in the orbit is also illustrated in the following manner: As the arm G rotates, it carries with it the crank K, which, as above described, is connected by the bar M with the stationary crank E of the post E. It follows, therefore, that in each revolution of the arm G the crank K will also make one complete revolution, and that the arm K, in which the upper portion of said crank is j ournaled, will be given a corresponding movement, and that as said bar is connected to the axis II the latter will be moved to constantly change its inclination, this being possible from its universal-joint connection with the arm G. The arm orbar M acts to keep the arm K constantly parallel to arm G to maintain parallelison of the earth globe.

l/Ve do not wish to confine ourselves to the particular form and construction of support herein shown and described, as the same may be changed, as may other minor parts, without departing from the spirit and scope of our invention.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a tellurian, the combination of a suitable support, a stationary representation of the sun, a horizontally-reciprocating slide,

means for actuating the same, a cranked post carried by said slide, a lower horizontal arm pivoted on said post, a vertical crank-shaft carried by said arm, an upper horizontal arm which connects the said post and crank-shaft, a pitman-bar also connecting a crank of said post with the said crank-shaft, above the upper arm, an oblique shaft connected to the said lower arm by a universal joint and also loosely connected to the said upper arm, means for rotating said shaft, and a representation of the earth carried by said shaft, substantially as specified.

2. In a tellurian, the combination of the horizontally-reciprocating slide, a support therefor, the main post E set therein, and having the cranks E, E the hub rotatably mounted on said post, the horizontal arm attached to said hub, the inclined shaft universally jointed to said arm and carrying a representation of the earth, the pulley on said shaft, the stationary disk aflixed to the crank E of said post and belted to the said pulley, the crank K journaled on said arm, the bar K connecting the crank E with the said crank and loosely connected to the said shaft, the bar M connecting the crank E with the upper arm of crank K, and means for revolving the said hub and at the same time reciprocating the said slide, substantially as specified.

3. In a tellurian, the combination of the horizontally-reciprocating slide, a support therefor, the post E carried thereby and having cranks E, E the hub rotatably mounted on said post, the horizontal arm attached to the said hub, the inclined shaft. universally jointed to the said arm, and carrying a representation of the earth, the sleeve 1 rotatably mounted on said shaft and carrying a representation of the moon, the crank K j ournaled in said arm, the bar K connecting said crank with the post E, said bar having a connection with the sleeve I the bar M connecting the crank E with the upper arm of crank K, and means for revolving the said arm, and at the same time to reciprocate the slide and rotate the said shaft, substantially as specified.

4. The herein described tellurian, comprising a bracket-arm B hinged or pivoted to a suitable support and adapted to swing in a horizontal plane, a box or casing mounted upon the said arm, a slide-frame fitted to reciprocate horizontally in the said box or casing, a gear-wheel journaled in the said slideframe, a link eccentrically connected to said gear-wheel, and also connected to the box or casin g, a cranked post E carried by said slideframe, a hub rotatably mounted thereon and carried by a gear-wheel in mesh with the firstnamed gear-wheel, a horizontal arm G attached to said hub, an inclined shaft universally jointed to the said arm G and carrying a representation of the earth, a sleeve I rotatably mounted on said shaft and carrying a representation of the moon, the crank K journaled in said arm G, the bar K connecting the said crank with the post E, said bar having a connection with the sleeve 1 the bar M connecting the upper arm of said crank with a crank of the post E, and a representation of the sun carried by the arm B, all substantially as and for the purpose specified.

In testimony whereof we affix our signatures in presence of two witnesses.

JACOB MCDONALD. GEORGE MCDONALD. \Vitnesses:

F. M. REED, D. G. OHIPMAN. 

